Keep the card reader connected to a mobile device.

Keeping the card reader connected to a mobile device shortens the transaction time, so we recommend it for busy, crowded situations.  

1. Sign in to the application as an administrator.
2. Open the main menu by tapping the icon (≡) and go to Settings->Devices->Card reader. 
3. In the right window, move the slider Do not disconnect the card reader after a transaction to the right to activate this option.